The Physics of an Electric Motor
An electric motor is a device used to convert electric energy into rotational kinetic energy. There are two different types of electric motors, and each has there own use. The different types are direct current and alternating current motors. Each of these motors will be analyzed in the following.
To understand how this motor works, we must understand the relationship between electricity, and magnetism or simply put electromagnetism. Direct electric current in a simple description: There are two requirements for current flow. The first is a source of electrical potential energy or EMF (electro motive force,). The second is a conductor that provides a complete loop to carry the current. The reason a conductor will conduct is found on the atomic level. A conductive atom’s valance shell is not completely full electrons will flow from atom to atom because of this. When these electrons move from one atom to another that is electrical current (a brief description that is).
A magnet can be made from different materials, but loadstone is the natural form. The most important part of magnetism to make electric motors work is: A magnet has two different ends, or poles a north and a south pole. These poles behave like electric charges, like poles repel and unlike poles attract although magnets have no affect on still charges. The relationship between electricity and magnetism is that each phenomenon is that each generates a field. Electric fields can be pictured by thinking in terms of gravitational forces. Where, any two objects have a gravitational force one another. Any two electric charges have a force between them (either repelling, or attracting depending on polarity). These electric fiel...
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...degrees,
increases in the opposite or negative direction until it attains maximum negative value at 270 degrees, and finally decreases to zero value again at 360 degrees. It follows, then, that the induced emf can be completely described by the relation.
v+Vmaxsin(angular position of coil)”(cookeadamsdellmoore pg 509)
This hopefully adds some insight into the use of electric motors, and the principals of them that make these motors work. Such as electromagnetism, binary switches for DC motors, and the selection of a running frequency of a motor through the use of an oscillator.
Bibliography
http://gcsephysics.com.pme12htm
Physics a world view forth edition: Larry D. Kirkpatrick, Gerald F. Wheeler; copyright 1992
Basic Mathematics for Electronics seventh edition: Nelson M. Cooke, Herbert F.R Adams, Peter B. Dell, T. Adair Moore; Copyright 1960
"Domestic Violence and Abuse." : Signs of Abuse and Abusive Relationships. N.p., n.d. Web. 27 Nov. 2013.
Electric guitars are devices that generate sound from a set of pickups that convert string vibration into electrical signals for amplification. The sound starts out as vibrations the musician creates while playing. These vibrations are picked up by the pickups of the guitar. What are pickups? Pickups are permanent magnets wrapped around in a coil. Since the strings are made with a special material called ferromagnetic, they interact with the magnetic fields in the pickups and force electrons to move in the loop. Moving electrons can generate a signal that can be read by the amplifier.
Smith, Meldina, and Jeanne Segal. "Domestic Violence and Abuse." : Signs of Abuse and Abusive Relationships. N.p., Feb. 2014. Web. 12 Mar. 2014.
Another reason was identity. Napoleon only represented Stalin, and that really brought out his characteristics. Since Napoleon was meant to represent Stalin, all of Stalin’s traits, most of his bad deeds, and events occurred in the book. For example, in Animal Farm, Orwell made Snowball seem smarter than Napoleon, but made Napoleon more powerful. This is true in real life because Lenin was a lot more educated than Stalin, but Stalin ended up with the power (Radinsky 97)
Stalin was “born in Gori, Georgia” as the third and only surviving child of a “cobbler and ex-serf”(Compton’s 403). His true name was Iosif Vissarionovich Dzhugashvili. “In 1912 he took the alias of ‘Stalin’, from the Russian word stal, meaning ‘steel”, hence his nickname “Man of Steel”(Compton’s 402). Stalin began his studies at the seminary as a devout believer in Orthodox Christianity, where he was soon exposed to the radical ideas of fellow students. In 1899, just about the time of graduation, he gave up his religious education and to devote his time to the revolutionary movement against the Russian monarchy. In 1902 Stalin was hunted down and arrested by the imperial police for organizing a large worker’s demonstration. A year later he was sentenced to “exile in the Russian region of Siberia, but soon managed to escape and was back in Georgia by early 1904”(Archer 58). When the Russian Social Democratic Party split into Menshevik and Bolshevik factions, Stalin sided with the Bolsheviks, who just happened to be led by Vladimir Lenin. Stalin immediately became a staunch follower of Lenin, studying his every move. He did marry in 1905 but his beloved bride died of tuberculosis two years later. Their son, Yasha, died later in a Nazi Prison camp during World War II. After the Bolshevik’s Civil War victory, Stalin became highly organized and was elected secretary of the Communist Party. “After Lenin’s death, Stalin gradually isolated and shunned his political rivals, especially Leon Trotsky, and by the end of 1929 Joseph Stalin had succeeded in eliminating his opponents and became the supreme leader of the USSR” (Compton’s 404).
In the beginning Josef Stalin was a worshiper of his beloved Vladimir Lenin. He followed his every move and did as he said to help establish and lead the Bolshevik party. Much of the early part of his political career was lost due to his exile to Siberia for most of World War I. It wasn’t until 1928, when he assumed complete control of the country were he made most of his success. After Lenin’s death in January 1924, Stalin promoted his own cult followings along with the cult followings of the deceased leader. He took over the majority of the Socialists now, and immediately began to change agriculture and industry. He believed that the Soviet Union was one hundred years behind the West and had to catch up as quickly as possible. First though he had to seal up complete alliance to himself and his cause.
Rett syndrome is a particular neurological disorder that is first found in the first few months of life and typically almost always diagnosed in girls, but can be seen in boys, rarely, but it is possible (International Rett Syndrome Foundation, 2014). Rett syndrome symptoms soon appear after an early period of regular or near regular development until six to eighteen months of life, when there is a slowing down or stopping of skills. A period of backsliding then follows when the young female child loses communication skills and purposeful use of her hands. Soon, the known physical handicaps became visible such as washing hands, difficulty walking, and head growth abnormalities, the head will grow slower than it supposed to. More symptoms that may be brought on by the syndrome can include seizures and rapid and/or slow breathing repetitions while the child is not sleep. In the younger years of childlife, there may be a time of separation or withdrawal when she is irritable and cries inconsolably. With time, motor skill problems may increase, but in generally, the irritability the child endures lessens and eye contact and communication improve (International Rett Syndrome Foundation, 2014). According to rettsyndrome.org, Rett syndrome is caused by mutations on the X chromosome on a gene called MECP2. There are more than 200 different mutations found on the MECP2 gene. Most of these mutations are found in eight different spots. It strikes all racial and ethnic groups, and occurs worldwide in 1 of every 10,000 to 23,000 female births (Rett Syndrome Foundation, 2014). It is not a degenerative disorder, saying that this syndrome does not cause the body or the mind of the infected child to become weaker. It also causes problems in brai...
...which moves a magnet back and forth through a coil of wire to generate electrical current in the wire. To prevent physical wear the piston does not actually touch the inside of the mechanism. This generator is mostly used in NASA projects.
Mayo Clinic Staff. (2011, May 21). Mayo Clinic. Retrieved from Domestic violence against women: Recognize patterns, seek help: http://www.mayoclinic.org/domestic-violence/art-20048397?p=1
...nduced in a conductor moving at right angles to and cutting across a magnetic flux. On the other hand, magnet is a useful in our daily life such as it can hold some documents and use to move an object. For example, a bicycle dynamo is a small generator fitted by bicycle to provide electricity for the lights bulb, it using the principle of electromagnetism. There are 2 law of electromagnetic induction such as Faraday’s Law and Lenz’s Law. In the other hand, Lenz’s Law state that induced current always flows in such a direction so as to opposite the change causing it. When north pole is approach the solenoid, the front part of solenoid will creates a north pole to produce a force of repulsion to oppose the change of motion. And the direction of current in the solenoid can determined by Right-hand Grip Rule. Lenz’s Law also is a form of law of conservation of energy.
In this day and age with oil prices rising and the recession hitting everyone, more people are looking for more ways to save on cost of the most used items. Electricity is the most common and used item people use in everyday life, but what they do not know is that there is a simpler way to produce electricity with magnets. How do magnets produce electricity? Why not use magnets to produce all electricity? These questions are common in people that research different avenues to provide electricity without having to spend a fortune on other renewable energy sources. Magnets and all their uniqueness is the key to the future discoveries and creation of new machines that produce electricity without using fossil fuels.
Thesis: In my paper, I will be examining the different types, possible causes, and effects of Intimate Partner Violence, and what treatments or programs are available to combat this growing problem in America. Regardless of differing approaches to fight it, statistics show that women all across the world suffer from the effects of domestic violence at a similar rate independent of class, race, or religion.
Tesla designed and invented the tesla coil in 1891. The tesla coil is used to transmit- high electricity and high frequency using the rotating magnetic field, and Alternating Current similar to the design he used for the rotating magnetic field. Tesla often experimented using two or sometimes three of the coils. He wanted to pursue these new devices to bring about innovations and discoveries. Tesla was also going to use them to help deliver free energy to the people. He envisioned and believed the Earth to be a big magnet of transmitting electricity. He thought the only thing missing from it was basically a receiver. But his tesla coils helped him bring about the invention of electrical lighting, his very used and widely-known x-ray, electrotherapy, and as I have previously stated, this was his first step at trying to receive energy from the earth. Today, the tesla coil is used for amusement and in some cases, they are used to identify leaks in a vacuum system. So how does the tesla coil work? They start off with a simple spark to set it off. Oscillators, I believe I mentioned them in the history of Tesla, they are basically used to help deliver an oscillating current. The oscillator helps the coils produce currents that can range anywhere from 50 kilovolts to several million volts of electricity. This is what your typical mad scientist use in things such as Frankenstein. Except for Tesla was a very real version of those mad scientists. The tesla coil also had a capacitor in it, they are used to store an electrical current that bursts out to help it create a stronger voltage. I have also read that there is something in it called a spark gap which is a switch in the coil to turn it on. Since I have let you know what the machine consists of, I will now discuss the operation cycle. First, the transformer sends high voltages up to the capacitor. There is something called a breakdown voltage there.
It is very simple, from the name itself we can understand that there is induction process occurred. Actually when we are giving the supply to the stator winding, flux will generate in the coil due to flow of current in the coil. Now the rotor winding is arranged in such a way that it becomes short circuited in the rotor itself. The flux from the stator will cut the coil in the rotor and since the rotor coils are short circuited, according to Faraday's law of electromagnetic induction, current will start flowing in the coil of the rotor. When the current will flow, another flux will get generated in the rotor. Now there will be two flux, one is stator flux and another is rotor flux and the rotor flux will be lagging to the stator flux. Due to this, the rotor will feel a torque which will make the rotor to rotate in the direction of rotating magnetic flux. So the speed of the rotor will be depending upon the ac supply and the speed can be controlled by varying the input supply. This is the working principle of an induction motor of either
An electric vehicle is different from a gasoline powered vehicle. It is powered instead by an electric motor that receives current from rechargeable storage batteries, or portable sources of electrical energy.